pneumatic

英[njuː'mætɪk] 美[numætɪk]

近义词

反义词

pneumatic 气动的，风动的

来自希腊语pneuma,空气，风，呼吸，来自pnein,吹动，呼吸，来自PIE*pneu,呼吸，拟声词。

pneumatic: pneumatic: [17] Pneumatic denotes etymologically ‘of the wind or breath’. It comes via Latin pneumaticus from Greek pneumatikós, a derivative of pneuma ‘wind, breath’ (which is distantly related to English sneeze). Despite its similarity, pneumonia [17] does not come ultimately from the same source. It goes back to Greek pleúmōn ‘lung’, a relative of Latin pulmō (source of English pulmonary), which was altered to pneumōn under the influence of pneuma. From this was derived pneumoníā, acquired by English via Latin pneumonia.
=> pneumonia, pulmonary
pneumatic (adj.): 1650s, from Latin pneumaticus "of the wind, belonging to the air," from Greek pneumatikos "of wind or air" (which is attested mainly as "of spirit, spiritual"), from pneuma (genitive pneumatos) "the wind," also "breath" (see pneuma). Earlier was pneumatical (c. 1600).

1. This pneumatic tool will double the speed of assembly.: 这个气动工具可以把装配速度提高一倍.

2. Much of their study and revision was done to the thud of hammers and pneumatic drills.: 他们学习和复习时大多都伴着锤子和风钻沉闷的敲击声。

3. Light kernels may be removed by a pneumatic or air seperator.: 轻的籽粒可以通过空气动力,即气流分选机清理出来.

4. Experiments in pneumatic conveying show that there exists a maximum particle concentration.: 气力输送实验表明,这里存着一个最大的颗粒浓度.

5. We replaced hand picks with pneumatic picks and electric drills.: 我们把手镐换成风镐和电钻.